Special Conditions; Derating For Ambient Temperature And Switching Frequency; Derating For Low Air Pressure And High Altitudes; General Technical Data - Danfoss VLT Compressor Drive CDS 803 Bedienungsanleitung

VLT® Compressor Drive CDS 803
Operating Guide
RFI filter Conduct emission. Maximum shielded cable length [m
type (ft)]
EN/IEC Category C3
61800-3
Second environ-
ment Industrial
With- With
out ex- exter-
ternal nal fil-
filter ter
H4 RFI filter (EN 55011 A1, EN/IEC61800-3 C2)
6.0– 10 – –
kW (8.0–
15 hp)
3x200–
240 V
IP20
H2 RFI filter (EN 55011 A2, EN/IEC 61800-3 C3)
18–30 kW 5 (16.4) –
(25– 40
hp)
3x380–
480 V
IP20

6.4 Special Conditions

6.4.1 Derating for Ambient Temperature and Switching Frequency

Ensure that the ambient temperature measured over 24 hours is at least 5 °C (41 °F) lower than the maximum ambient temperature
that is specified for the drive. If the drive is operated at a high ambient temperature, decrease the constant output current. For de-
rating curve, see the VLT® Compressor Drive CDS 803 Design Guide.

6.4.2 Derating for Low Air Pressure and High Altitudes

The cooling capability of air is decreased at low air pressure. For altitudes above 2000 m (6562 ft), contact Danfoss regarding PELV.
Below 1000 m (3281 ft) altitude, derating is not necessary. For altitudes above 1000 m (3281 ft), decrease the ambient temperature
or the maximum output current. Decrease the output by 1% per 100 m (328 ft) altitude above 1000 m (3281 ft) or reduce the maxi-
mum ambient temperature by 1 °C (33.8 °F) per 200 m (656 ft).

6.5 General Technical Data

6.5.1 Protection and Features

• Electronic motor thermal protection against overload.
• Temperature monitoring of the heat sink ensures that the drive trips if there is overtemperature.
• The drive is protected against short circuits between compressor terminals U, V, W.
• When a compressor phase is missing, the drive trips and issues an alarm.
• When a mains phase is missing, the drive trips or issues a warning (depending on the load).
• Monitoring of the DC-link voltage ensures that the drive trips when the DC-link voltage is too low or too high.
• The drive is protected against ground faults on compressor terminals U, V, W.
34 | Danfoss A/S © | 2019.12
Housing, trades,
and light indus-
tries
Category C2 Category C1
First environment First environ-
Home and office ment Home and
office
With- With With-
out ex- exter- out ex-
ternal nal fil- ternal
filter ter filter
25 (82) 50 –
(164)
– – –
Radiated emission
Category C3 Category C2
Second environ- First environ-
ment Industrial ment Home and
office
With With- With With-
exter- out ex- exter- out ex-
nal fil- ternal nal fil- ternal
ter filter ter filter
20 (66) – – Yes
– Yes – No
Specifications
Category C1
First environ-
ment Home and
office
With With- With
exter- out ex- exter-
nal fil- ternal nal fil-
ter filter ter
Yes – No
– No –
AQ32174876762701-000101 / 130R0627